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한국고무학회> Elastomers and composites

Elastomers and composites update

  • : 한국고무학회
  • : 공학분야  >  화학공학
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  • : 2092-9676
  • : 2288-7725
  • : 고무학회지(~1997) → 엘라스토머(1998~) → elastomers and composites(2009~)

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수록범위 : 1권1호(1966)~56권2호(2021) |수록논문 수 : 1,658
Elastomers and composites
56권2호(2021년 06월) 수록논문
최근 권호 논문
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KCI등재

1A Review on Recent Development and Applications of Dielectric Elastomers

저자 : Jin Sung Seo , Dohyeon Kim , Sosan Hwang , Sang Eun Shim

발행기관 : 한국고무학회 간행물 : Elastomers and composites 56권 2호 발행 연도 : 2021 페이지 : pp. 57-64 (8 pages)

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This paper reviews recent developments and applications of dielectric elastomers (DEs) and suggests various techniques to improve DE properties. DEs as smart materials are a variety of electro-active polymers (EAPs) that convert electrical energy into mechanical energy and cause a large deformation when a voltage is applied. The dielectric constant, modulus, and dielectric loss of DEs determine the efficiency of deformation. Among these, the dielectric constant significantly affects their performance. Therefore, various recent approaches to improve the dielectric constant are reviewed, including the enhancement of polarization, introduction of microporous structures in the matrix, and introduction of ferroelectric fillers. Furthermore, the basic principles of DEs are examined, as well as their various applications such as actuators, generators, sensors, and artificial muscles.

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2Electrical Properties of CNT and Carbon Fiber Filled Hybrid Composites Based on PA66

저자 : Minji Lee , Se-ho Park , Kwang-hwan Jhee , Hyoungsan Kye , Daesuk Bang

발행기관 : 한국고무학회 간행물 : Elastomers and composites 56권 2호 발행 연도 : 2021 페이지 : pp. 65-71 (7 pages)

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In recent times, the demand for electronic devices has increased because of advancements in the electronics industry. Consequently, research on shielding against electromagnetic interference (EMI) from electronic devices has also progressed significantly. In particular, research on imparting electrical conductivity to plastic has seen substantial progress. In this study, the effect of hybrid fillers comprising carbon fiber (CF) and carbon nanotubes (CNTs) on the electrical properties of polyamide 66 (PA66) composites was investigated. PA66 composites were prepared using a BUSS Co-Kneader single-screw extruder. EMI shielding effectiveness (SE) increased with the increasing addition of unsized CF (UCF), sized CF (SCF), and CNTs. For the PA66/SCF/CNT hybrid filler composites, EMI SE significantly increased with the increase in SCF content. Finally, the hybrid filler comprising SCF and CNTs may have a synergistic effect on the EMI SE and surface resistivity of PA66/SCF/CNT composites.

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3Characterization of EVA/PCM/Silica Compound using Silica

저자 : Tae-hyun Kim , Kyung-man Choi , Jong-hwan Lee , Myeon-cheon Choi , Han-seong Kim

발행기관 : 한국고무학회 간행물 : Elastomers and composites 56권 2호 발행 연도 : 2021 페이지 : pp. 72-78 (7 pages)

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A phase-change material (PCM) is a material that has the ability to delay heat transfer by absorbing heat from its environment or releasing heat to its environment while its phase changes from solid to liquid or liquid to solid at a specific temperature. As it is applied, it can contribute to environmental conservation such as energy savings and carbon dioxide emission reduction. In order for a PCM to store and release heat, the volume change during its phase transition should be large, and thus a phase transition space is required. When a PCM is used as a polymer additive, it is confined within the polymer, and there is no phase transition space; thus, its ability to absorb and release heat is significantly reduced. Therefore, in this study, porous silica was used to provide EVA/PCM compounds with sufficient space for their phase transition, and to improve the compatibility between the EVA and PCM, modified silica is used: surface-modified 5 wt% silica with 3-methacryloxypropyltrimethoxysilane. The compound was prepared and compared with the silica compound. The presence or absence of the modified silica surface modification was confirmed using Fourier-transform infrared spectroscopy and thermogravimetric analysis, the heat capacity of the compound was evaluated based on a differential scanning calorimetry analysis, and its mechanical strength and morphology were determined using scanning electron microscopy.

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4Development of Hyperelastic Model for Butadiene Rubber Using a Neural Network

저자 : Truong Thang Pham , Changsu Woo , Sanghyun Choi , Juwon Min , Beomkeun Kim

발행기관 : 한국고무학회 간행물 : Elastomers and composites 56권 2호 발행 연도 : 2021 페이지 : pp. 79-84 (6 pages)

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A strain energy density function is used to characterize the hyperelasticity of rubber-like materials. Conventional models, such as the Neo-Hookean, Mooney-Rivlin, and Ogden models, are widely used in automotive industries, in which the strain potential is derived from strain invariants or principal stretch ratios. A fitting procedure for experimental data is required to determine material constants for each model. However, due to the complexities of the mathematical expression, these models can only produce an accurate curve fitting in a specified strain range of the material. In this study, a hyper-elastic model for Neodymium Butadiene rubber is developed by using the Artificial Neural Network. Comparing the analytical results to those obtained by conventional models revealed that the proposed model shows better agreement for both uniaxial and equibiaxial test data of the rubber.

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5A Variety of Particles Including Tire Wear Particles Produced on the Road

저자 : Ui Yeong Jung , Sung-seen Choi

발행기관 : 한국고무학회 간행물 : Elastomers and composites 56권 2호 발행 연도 : 2021 페이지 : pp. 85-91 (7 pages)

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In this study, different types and shapes of various particles produced on the asphalt pavement road were analyzed. Road dust at a bus stop was collected and was separated as per their sizes by using a sieve shaker. Tire-road wear particles (TRWPs), asphalt pavement wear particles (APWPs), mineral particles, plant-related particles, glass beads, glass particles, road paint wear particles, plastic particles, and fibers were observed herein. The types and shapes of the particles varied depending on their sizes. TRWPs larger than 500 μm were not observed. TRWPs with a size of 212-500 μm were rarely present, but many TRWPs with a size smaller than 212 μm were observed. APWPs were observed for whole-particle sizes of below 1,000 μm. A variety of particles on the road would lead to lower friction between the tires and the road, thereby increasing the braking distance of vehicles. Most of the particles include mineral particles, glass particles, and APWPs with rough surfaces. Therefore, the abrasion of the tire tread would accelerate owing to friction with the tough particles.

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6Change of Crystalline Properties of Poly(ethylene-co-vinyl acetate) according to the Microstructures

저자 : Sung-seen Choi , Yu Yeon Chung

발행기관 : 한국고무학회 간행물 : Elastomers and composites 56권 2호 발행 연도 : 2021 페이지 : pp. 92-99 (8 pages)

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Microstructure-dependent changes in the crystalline properties of poly(ethylene-co-vinyl acetate) (EVA) was investigated using various EVAs at different VA contents via X-ray diffraction (XRD). The parameters analyzed herein were percentage crystallinity (Xc), interplanar crystal spacing (dhkl), crystal stack size (Dhkl), and the number of crystal plane piles (Nhkl). The Xcs of [110] and [200] crystals were 21.0-4.1 and 6.7-1.4%, respectively, and they decreased by approximately 2.3 and 0.7% for every mol% of the VA content, respectively. The Xc ratios of the [110] and [200] crystals were approximately 3. The d110s and d200s values were 0.41-0.42 and 0.37-0.38 nm, respectively. The D110s and D200s values were 9.56 -21.92 and 7.00-16.42 nm, respectively. The dhkls increased with an increase in the VA content, whereas the Dhkls decreased. The N110s and N200s were 22.7-51.3 and 18.3-43.2, respectively, and they decreased by increasing the VA content. EVA with the same VA content showed different crystalline properties as per the suppliers, and some EVAs deviated from the average trends. This could be explained by the difference in their microstructures such as the sizes and distribution uniformity of the ethylene sequences in EVA chains.

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